Auroras Are Caused by

question 29

Multiple Choice

Auroras are caused by

• A) gases fluorescing in the atmosphere because of collisions with solar wind particles.
• B) the magnetosphere of Earth touching its atmosphere.
• C) the ozone layer being destroyed by UV light.
• D) the atmospheric greenhouse effect.
• E) the scattering of sunlight from particles in Earth's stratosphere.

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Definitions:

Replication

To provide a 3' end to which DNA polymerase adds nucleotides. The RNA primer is later degraded and replaced with DNA.

DNA Replication

The biochemical process of producing two identical replicas from one original DNA molecule, critical for cell division and genetic inheritance.

5¢->3¢ Direction

The orientation of nucleic acid chains in DNA and RNA synthesis, indicating the direction from the 5' end (phosphate group) to the 3' end (hydroxyl group).

Replication Fork

Y-shaped structure produced during the semiconservative replication of DNA.